Mainsail
Mainsail A1
The A‑1 mainsail for the International 420 is a versatile all‑purpose design. It has been specifically optimized for crews with a combined weight of over 115 kg.
Made from Dacron HTP‑165 Square, this deep‑cut sail provides a particularly powerful profile shape, making it easier for teams in this weight range to accelerate and maintain consistent drive.
Headsails
Fock AP-1
The AP‑1 jib for the International 420 has been specifically developed for modern, high‑load inhaul sheeting and meets the demands of performance‑oriented racing teams. By using two carbon battens, the sail’s weight is reduced to an absolute minimum while ensuring maximum shape stability, durability, and performance.
Made from premium Dacron HTP‑165 Square in a bi‑radial layout, this sail offers exceptionally stable profile retention across a wide wind range. The bi‑radial construction ensures that loads are distributed optimally along the fiber directions, significantly increasing the sail’s lifespan while maintaining its shape even under high pressure.
This makes the AP‑1 jib an essential sail for teams of any weight class who value precise trim, high speed, and reliable material quality. A true must‑have for ambitious 420 sailors.
Spinnaker all-purposeSA-1
The all‑purpose spinnaker for the International 420 class is slightly fuller in shape. Its more stable design makes trimming easier, especially in choppy conditions. We manufacture this spinnaker from 0.5 oz polyester cloth and offer it exclusively in white.

